| Acronym | Definition |
|---|
| PNI➣Psychoneuroimmunology |
| PNI➣Positivo, Negativo, Interesante (Spanish: Positive, Negative, Interesting) |
| PNI➣Princeton Neuroscience Institute (Princeton University; Princeton, NJ) |
| PNI➣Prescott New Instructions |
| PNI➣Physical Network Inventory (various companies) |
| PNI➣Producción Nacional Independiente (Venezuela) |
| PNI➣Pacific Neuropsychiatric Institute (Seattle, Washington) |
| PNI➣Perineural Invasion |
| PNI➣Progressive Networks, Inc. |
| PNI➣Pharmaceutical News Index |
| PNI➣Palestinian National Initiative |
| PNI➣Positive, Negative, Interesting (decision making) |
| PNI➣Porter Novelli International (public relations; various locations) |
| PNI➣Pohnpei, Caroline Islands, Micronesia - Pohnpei International (Airport Code) |
| PNI➣Pacific Nanotechnology, Inc. (Santa Clara, CA) |
| PNI➣Prescott New Instruction (Intel chips; early codename) |
| PNI➣Partido Nacional Independiente (National Independent Party, Costa Rica) |
| PNI➣Pro Natura International (Paris, France) |
| PNI➣Paid/No Issue (banking term) |
| PNI➣Productivity Network, Inc. |
| PNI➣Paranormal Ideation |
| PNI➣Pacific Neurosciences Institute |